The Spread and Eradication of Smallpox 19191977

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=NUlPr5dSdpE

This video shows the map timelapse of the smallpox virus from 1919 to 1977. Smallpox was an infectious disease caused by one of two virus variants, Variola major and Variola minor. The last naturally occurring case was diagnosed in October 1977, and the World Health Organization (WHO) certified the global eradication of the disease in 1980. • Twitter: / wawamustats • Facebook: https://fb.me/wawamustats • Source: • World Health Organization • Subscribe here: https://www.youtube.com/wawamustats?s...

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